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Q11. Given: 

Which is true? 

A. Sum for 0 to 0 = 55 

B. Sum for 0 to 10 = 55 

C. Compilation fails due to error on line 6. 

D. Compilation fails due to error on line 7. 

E. An Exception is thrown at the runtime. 

Answer:

Explanation: 

Loop variables scope limited to that enclosing loop. So in this case, the scope of the loop variable x declared at line 5, limited to that for loop. Trying to access that variable at line 7, which is out of scope of the variable x, causes a compile time error. So compilation fails 

due to error at line 7. Hence option D is correct. 

Options A and B are incorrect, since code fails to compile. 

Reference: httpsy/docs.oracle.com/javase/tutorial/java/nutsandbolts/variables.html 


Q12. Given the code fragment 

int var1 = -5; 

int var2 = var1--; 

int var3 = 0; 

if (var2 < 0) { 

var3 = var2++; 

} else { 

var3 = --var2; 

System.out.println(var3); 

What is the result? 

A. – 6 

B. – 4 

C. – 5 

D. 5 

E. 4 

F. Compilation fails 

Answer:


Q13. Given: 

What is the result? 

A. 2 4 6 8 10 12 

B. 2 4 6 8 10 12 14 

C. Compilation fails 

D. The program prints multiple of 2 infinite times 

E. The program prints nothing 

Answer:


Q14. Given the code fragment: 

Which code fragment, when inserted at // insert code here, enables the code to compile and and print a b c? 

A. List update (String[] strs) 

B. Static ArrayListupdate(String [] strs) 

C. Static List update (String [] strs) 

D. Static void update (String[] strs) 

E. ArrayList static update(String [] strs) 

Answer:


Q15. Given: 

class Overloading { 

int x(double d) { 

System.out.println("one"); 

return 0; 

String x(double d) { 

System.out.println("two"); 

return null; 

double x(double d) { 

System.out.println("three"); 

return 0.0; 

public static void main(String[] args) { 

new Overloading().x(4.0); 

What is the result? 

A. One 

B. Two 

C. Three 

D. Compilation fails. 

Answer:


Q16. Given the code fragment: 

StringBuilder sb = new StringBuilder ( ) ; 

Sb.append (“world”); 

Which code fragment prints Hello World? 

A. sb.insert(0,"Hello "); 

System.out.println(sb); 

B. sb.append(0,"Hello "); 

System.out.println(sb); 

C. sb.add(0,"Hello "); 

System.out.println(sb); 

D. sb.set(0,"Hello "); 

System.out.println(sb);D 

Answer:

Explanation: The java.lang.StringBuilder.insert(int offset, char c) method inserts the string representation of the char argument into this sequence. The second argument is inserted into the contents of this sequence at the position indicated by offset. The length of this sequence increases by one.The offset argument must be greater than or equal to 0, and less than or equal to the length of this sequence. 

Reference: Java.lang.StringBuilder.insert() Method 


Q17. Given: 

What is the result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q18. Given: 

public class ScopeTest { 

int j, int k; 

public static void main(String[] args) { 

ew ScopeTest().doStuff(); } 

void doStuff() { 

nt x = 5; 

oStuff2(); 

System.out.println("x"); 

void doStuff2() { 

nt y = 7; 

ystem.out.println("y"); 

or (int z = 0; z < 5; z++) { 

ystem.out.println("z"); 

ystem.out.println("y"); 

Which two items are fields? 

A. j 

B. k 

C. x 

D. y 

E. z 

Answer: A,B 


Q19. Given: 

A. Ym Xm2 

B. Ym Xm1 

C. Compilation fails 

D. A ClassCastException is thrown at runtime 

Answer:


Q20. Given the code fragment: 

What is the result? 

A. Jesse 25 Walter 52 

B. Compilation fails only at line n1 

C. Compilation fails only at line n2 

D. Compilation fails at both line n1 and line n2 

Answer: