101. Which of the following is the modulus operator in Java?

A) %
B) /
C) *
D) &
✅ Answer: A) %

102. What is the result of 5 + 3 * 2?

A) 16
B) 11
C) 10
D) 13
✅ Answer: B) 11

103. Which operator has the highest precedence in Java?

A) +
B) *
C) ++ (increment)
D) =
✅ Answer: C) ++ (increment)

104. Which of the following is a relational operator?

A) +
B) <
C) &
D) ||
✅ Answer: B) <

105. What is the result of 10 / 4 in Java?

A) 2.5
B) 2
C) 2.0
D) 0
✅ Answer: B) 2

106. Which operator is used for bitwise AND?

A) &&
B) &
C) |
D) ~
✅ Answer: B) &

107. Which operator is used to compare object references, not values?

A) ==
B) equals()
C) !=
D) =
✅ Answer: A) ==

108. What is the output of int a = 5; a++; System.out.println(a);?

A) 5
B) 6
C) 4
D) Error
✅ Answer: B) 6

109. What is the difference between ++i and i++?

A) No difference
B) ++i increments before use, i++ increments after use
C) i++ increments before use, ++i increments after use
D) ++i is illegal
✅ Answer: B) ++i increments before use, i++ increments after use

110. Which operator is used to check if two values are not equal?

A) !=
B) <>
C) !
D) =!
✅ Answer: A) !=

111. What is the output of System.out.println(5 & 3);?

A) 1
B) 7
C) 0
D) 2
✅ Answer: D) 1

112. Which operator is used for logical OR?

A) |
B) ||
C) &
D) &&
✅ Answer: B) ||

113. Which operator is used for conditional (ternary) operation?

A) ? :
B) ::
C) &&
D) %
✅ Answer: A) ? :

114. What is the output of System.out.println(true && false);?

A) true
B) false
C) 1
D) 0
✅ Answer: B) false

115. What is the output of System.out.println(true | false);?

A) true
B) false
C) 1
D) 0
✅ Answer: A) true

116. Which operator can be used for both arithmetic and string concatenation?

A) +
B) *
C) /
D) %
✅ Answer: A) +

117. What is the output of int x = 10; int y = 3; System.out.println(x % y);?

A) 1
B) 0
C) 3
D) 10
✅ Answer: A) 1

118. Which operator performs integer division?

A) /
B) %
C) *
D) //
✅ Answer: A) /

119. What is the result of ~5?

A) -6
B) 6
C) -5
D) 5
✅ Answer: A) -6

120. Which operator shifts bits to the left?

A) <<
B) >>
C) >>>
D) >>>>
✅ Answer: A) <<

121. Which operator shifts bits to the right with sign extension?

A) <<
B) >>
C) >>>
D) &
✅ Answer: B) >>

122. Which operator shifts bits to the right without sign extension?

A) >>
B) >>>
C) <<
D) &
✅ Answer: B) >>>

123. Which operator in Java is used for assignment?

A) =
B) ==
C) :=
D) =>
✅ Answer: A) =

124. What is the output of int a = 5; int b = 2; System.out.println(a / b);?

A) 2.5
B) 2
C) 3
D) Error
✅ Answer: B) 2

125. What is the output of System.out.println(2 + 3 * 4);?

A) 20
B) 14
C) 24
D) 9
✅ Answer: B) 14

126. Which operator is used for bitwise XOR?

A) ^
B) &
C) |
D) %
✅ Answer: A) ^

127. Which operator performs logical NOT?

A) !
B) ~
C) ^
D) &&
✅ Answer: A) !

128. What is the output of System.out.println(10 > 5 ? "Yes" : "No");?

A) Yes
B) No
C) true
D) false
✅ Answer: A) Yes

129. Which of these is a unary operator?

A) +
B) –
C) ++
D) All of the above
✅ Answer: D) All of the above

130. Which of these operators is used to check instance type?

A) instanceof
B) typeof
C) isA
D) type
✅ Answer: A) instanceof

131. Which operator returns the remainder of a division?

A) /
B) %
C) &
D) ||
✅ Answer: B) %

132. Which operator is used for compound assignment?

A) +=
B) ++
C) -=
D) Both A and C
✅ Answer: D) Both A and C

133. Which operator has lowest precedence?

A) *
B) +
C) =
D) ++
✅ Answer: C) =

134. Which operator combines assignment and arithmetic?

A) +
B) +=
C) =
D) ++
✅ Answer: B) +=

135. What is the output of System.out.println(3 + 4 * 2 / (1 - 5) % 2);?

A) 1
B) 3
C) 2
D) 0
✅ Answer: D) 0

136. What is the result of true ^ false?

A) true
B) false
C) Error
D) 1
✅ Answer: A) true

137. Which operator is used for logical AND?

A) &
B) &&
C) |
D) ||
✅ Answer: B) &&

138. Which operator is used for post-increment?

A) ++i
B) i++
C) i–
D) –i
✅ Answer: B) i++

139. Which operator is used for pre-increment?

A) ++i
B) i++
C) i–
D) –i
✅ Answer: A) ++i

140. Which operator is used for inequality comparison?

A) !=
B) =!
C) <>
D) ==
✅ Answer: A) !=

141. Which operator in Java can concatenate strings?

A) &
B) +
C) *
D) %
✅ Answer: B) +

142. Which operator cannot be applied to boolean values?

A) &&
B) ||
C) %
D) !
✅ Answer: C) %

143. Which operator is used to access members of an object?

A) . (dot)
B) ->
C) ::
D) @
✅ Answer: A) . (dot)

144. What is the output of System.out.println(5 << 1);?

A) 5
B) 10
C) 2
D) 1
✅ Answer: B) 10

145. What is the output of System.out.println(10 >> 1);?

A) 5
B) 10
C) 2
D) 20
✅ Answer: A) 5

146. Which operator is used to cast types explicitly?

A) (type)
B) cast()
C) convert()
D) as
✅ Answer: A) (type)

147. Which operator checks if two references point to the same object?

A) equals()
B) ==
C) !=
D) instanceof
✅ Answer: B) ==

148. Which operator is used for unsigned right shift?

A) >>
B) >>>
C) <<
D) &
✅ Answer: B) >>>

149. What is the output of System.out.println(1 + 2 + "3");?

A) 6
B) 33
C) 33.0
D) 123
✅ Answer: D) 33

(Check carefully: 1+2=3, then concatenated with “3” → “33”)

150. Which of these operators is right-associative?

A) =
B) +
C) *
D) %
✅ Answer: A) =

✅ Set 3 Complete (Operators & Expressions 101–150)

If you want, I can immediately continue with Set 4: Control Statements (151–200) next.

Do you want me to do that now?

Perfect! ✅ Let’s continue with Set 4: Control Statements (151–200) covering if, switch, loops, break/continue — all unique MCQs.

🧮 Set 4: Control Statements (50 MCQs, #151–200)

151. Which keyword is used to exit a loop immediately?

A) break
B) continue
C) exit
D) stop
✅ Answer: A) break

152. Which keyword skips the current iteration of a loop?

A) break
B) continue
C) skip
D) pass
✅ Answer: B) continue

153. Which of the following is a valid if statement?

A) if x > 5 { }
B) if (x > 5) { }
C) if x > 5 then { }
D) if (x > 5) then { }
✅ Answer: B) if (x > 5) { }

154. Which loop is guaranteed to execute at least once?

A) for
B) while
C) do-while
D) foreach
✅ Answer: C) do-while

155. Which statement is correct about the switch in Java?

A) It works with int, char, String, enum types
B) It works with double and float
C) It works only with integers
D) It works with boolean values
✅ Answer: A) It works with int, char, String, enum types

156. What is the output of:

A) Yes
B) No
C) Error
D) Nothing
✅ Answer: A) Yes

157. Which statement is used to exit a switch case?

A) exit
B) break
C) continue
D) stop
✅ Answer: B) break

158. Which loop is used when the number of iterations is known?

A) while
B) do-while
C) for
D) if
✅ Answer: C) for

159. Which of the following is an infinite loop?

A) for(;;) { }
B) while(true) { }
C) do { } while(true);
D) All of the above
✅ Answer: D) All of the above

160. Which statement about break is true?

A) It terminates the current loop or switch
B) It skips current iteration
C) It ends program
D) It pauses loop
✅ Answer: A) It terminates the current loop or switch

161. Which statement about continue is true?

A) Skips the current iteration and continues the loop
B) Terminates the loop
C) Exits the program
D) Does nothing
✅ Answer: A) Skips the current iteration and continues the loop

162. What is the output?

A) 2
B) 3
C) 5
D) 0
✅ Answer: B) 3

163. What is the output?

A) 01234
B) 0134
C) 1234
D) 124
✅ Answer: B) 0134

164. Which of these is valid switch syntax?

A) switch(x) { case 1: break; }
B) switch x { case 1: }
C) switch(x) case 1: break;
D) switch(x) { case 1 break; }
✅ Answer: A) switch(x) { case 1: break; }

165. Which of the following is correct for nested if?

A) if(a>5) if(b>3) System.out.println(“Yes”);
B) if(a>5) if b>3 System.out.println(“Yes”);
C) if(a>5) then if(b>3) System.out.println(“Yes”);
D) if a>5 if(b>3) print “Yes”;
✅ Answer: A) if(a>5) if(b>3) System.out.println(“Yes”);

166. Which loop checks condition before executing loop body?

A) for
B) while
C) do-while
D) foreach
✅ Answer: B) while

167. Which loop checks condition after executing loop body?

A) for
B) while
C) do-while
D) foreach
✅ Answer: C) do-while

168. What is the output?

A) 123
B) 12
C) 1
D) 0
✅ Answer: A) 123

169. Which is not a valid loop control statement?

A) break
B) continue
C) stop
D) return
✅ Answer: C) stop

170. Which is true about switch-case?

A) Cases can contain multiple statements
B) Cases must end with break (except last)
C) Default is optional
D) All of the above
✅ Answer: D) All of the above

171. What is the output?

A) 2
B) 23
C) 123
D) Error
✅ Answer: B) 23 (fall-through without break)

172. Which of these is correct for infinite for-loop?

A) for(;;) {}
B) for(;true;) {}
C) for(int i=0;i>=0;i++) {}
D) All of the above
✅ Answer: D) All of the above

173. Which statement terminates current iteration and continues next?

A) break
B) continue
C) return
D) exit
✅ Answer: B) continue

174. Which loop is preferred when number of iterations is unknown?

A) for
B) while
C) do-while
D) foreach
✅ Answer: B) while

175. Which statement is true about do-while loop?

A) Executes body at least once
B) Executes body only if condition true
C) Executes infinite times
D) None of the above
✅ Answer: A) Executes body at least once

176. Which is correct nested loop syntax?

A) for(int i=0;i<3;i++){ for(int j=0;j<2;j++){ } }
B) for i in 0..3 do for j in 0..2 do {}
C) for(i=0;i<3;i++) for j=0;j<2;j++{}
D) None
✅ Answer: A) for(int i=0;i<3;i++){ for(int j=0;j<2;j++){ } }

177. Which is correct way to exit a method immediately?

A) break
B) continue
C) return
D) stop
✅ Answer: C) return

178. Which statement about loops is true?

A) Loops can be nested
B) Loops can be infinite
C) Loops can be controlled with break/continue
D) All of the above
✅ Answer: D) All of the above

179. What is the output?

A) 001112
B) 011123
C) 012012
D) 001112
✅ Answer: D) 001112

180. Which is true about switch?

A) Can switch on String (Java 7+)
B) Can switch on double
C) Can switch on boolean
D) Cannot switch on char
✅ Answer: A) Can switch on String (Java 7+)

181. Which is valid while loop?

A) while(x<5) { }
B) while x<5 { }
C) while(x<5)
D) while x<5
✅ Answer: A) while(x<5) { }

182. Which is true about break inside nested loops?

A) Break exits only innermost loop
B) Break exits all loops
C) Break skips current iteration
D) Break does nothing
✅ Answer: A) Break exits only innermost loop

183. Which loop always checks condition first?

A) while
B) do-while
C) for
D) None
✅ Answer: A) while

184. Which statement about continue is false?

A) Skips remaining code of current iteration
B) Works with for, while, do-while loops
C) Terminates loop
D) Moves to next iteration
✅ Answer: C) Terminates loop

185. Which loop is suitable for iterating arrays?

A) for
B) while
C) do-while
D) All of the above
✅ Answer: D) All of the above

186. Which keyword can be used in labeled break?

A) break label;
B) continue label;
C) exit label;
D) stop label;
✅ Answer: A) break label;

187. Which keyword can be used in labeled continue?

A) break label;
B) continue label;
C) stop label;
D) exit label;
✅ Answer: B) continue label;

188. Which is the default case in switch?

A) Must be last
B) Optional
C) Cannot contain statements
D) Must contain break
✅ Answer: B) Optional

189. Which is invalid loop?

A) for(int i=0;;i++)
B) while(true)
C) do{}while(false)
D) for(int i=0;i<5;i++;)
✅ Answer: D) for(int i=0;i<5;i++;)

190. What is the output?

A) 123
B) 12
C) 1
D) 0
✅ Answer: A) 123

191. Which is correct for enhanced for-loop (foreach)?

A) for(int x: arr) { }
B) for(x in arr) { }
C) foreach(int x: arr) { }
D) for x: arr { }
✅ Answer: A) for(int x: arr) { }

192. Which statement about nested loops is true?

A) Inner loop completes for every outer loop iteration
B) Outer loop completes for every inner loop iteration
C) Nested loops are not allowed
D) Break in inner loop breaks outer loop automatically
✅ Answer: A) Inner loop completes for every outer loop iteration

193. Which statement about while loop is false?

A) Condition is checked before executing body
B) Can be infinite
C) Must execute at least once
D) Can use break/continue
✅ Answer: C) Must execute at least once

194. Which loop is guaranteed to execute at least once?

A) while
B) do-while
C) for
D) None
✅ Answer: B) do-while

195. Which statement is correct about switch fall-through?

A) Case executes until break is found
B) Case executes only one statement
C) Case cannot contain multiple statements
D) Case executes all cases automatically
✅ Answer: A) Case executes until break is found

196. Which statement is true for labeled break?

A) Exits specified loop
B) Skips iteration
C) Exits method
D) Pauses loop
✅ Answer: A) Exits specified loop

197. Which statement is true for labeled continue?

A) Skips to next iteration of specified loop
B) Terminates loop
C) Exits method
D) Pauses loop
✅ Answer: A) Skips to next iteration of specified loop

198. Which statement about loops is false?

A) Loops can be nested
B) Loops can have empty bodies
C) Loops cannot be infinite
D) Loops can use break/continue
✅ Answer: C) Loops cannot be infinite

199. Which loop uses an iterator internally?

A) Enhanced for-loop
B) Standard for
C) while
D) do-while
✅ Answer: A) Enhanced for-loop

200. What is the output?

A) 012
B) 123
C) 01
D) 0
✅ Answer: A) 012