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Q51. Which two are benefits of polymorphism? 

A. Faster code at runtime 

B. More efficient code at runtime 

C. More dynamic code at runtime 

D. More flexible and reusable code 

E. Code that is protected from extension by other classes 

Answer: C,D 


Q52. Given the definitions of the MyString class and the Test class: 

What is the result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q53. Which code fragment cause a compilation error? 

A. flat flt = 100F; 

B. float flt = (float) 1_11.00; 

C. float flt = 100; 

D. double y1 = 203.22; floatflt = y1 

E. int y2 = 100; 

floatflt = (float) y2; 

Answer:


Q54. Given the code fragment: 

Which modification enables the code fragment to print TrueDone? 

A. Replace line 5 With String result = "true"; Replace line 7 with case "true": 

B. Replace line 5 with boolean opt = l; Replace line 7 with case 1= 

C. At line 9, remove the break statement. 

D. Remove the default section. 

Answer:


Q55. Given the code fragment: 

for (int ii = 0; ii < 3;ii++) { 

int count = 0; 

for (int jj = 3; jj > 0; jj--) { 

if (ii == jj) { 

++count; 

break; 

System.out.print(count); continue; } 

What is the result? 

A. 011 

B. 012 

C. 123 

D. 000 

Answer:


Q56. Given: 

What would be the output, if it is executed as a program? 

A. name =, pass = 

B. name = null, pass = null 

C. name = null, pass = false 

D. name = null pass = true E. Compile error. 

Answer:

Explanation: 

Both name and pass variables are instance variables, and we haven't given them any 

values, so they take their default values. For Boolean default value is false and for string 

which is not a primitive type default is null So at line 7, null will printed as the value of the 

variable name, and at line 8 false will be printed. Hence Option C is correct. 

As explained above options A, B and D are incorrect. 

Code compiles fine so option E is incorrect. 

Reference: 

https://docs.oracle.com/javaseAutorial/java/javaOOAariables.html 


Q57. Given: 

What is the result? 

A. Red 0 

Orange 0 

Green 3 

B. Red 0 

Orange 0 

Green 6 

C. Red 0 

Orange 1 

D. Green 4 

E. Compilation fails 

Answer:


Q58. Given the code fragment: 

Which code fragment prints blue, cyan, ? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q59. Given the code fragment: 

Which option represents the state of the num array after successful completion of the outer loop? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q60. Given: 

What is the result? 

A. 100 210 

B. Compilation fails due to an error in line n1 

C. Compilation fails due to an error at line n2 

D. Compilation fails due to an error at line n3 

Answer: