Quick Answer: Which Of The Following Statement Can Be Used To Test Equality Alone?

Which of these is incorrect array declaration?


Which of these is an incorrect array declaration.

Explanation: Operator new must be succeeded by array type and array size.

Explanation: Array can be initialized using both new and comma separated expressions surrounded by curly braces example : int arr[5] = new int[5]; and int arr[] = { 0, 1, 2, 3, 4};.

How will Class protect the code inside it?

Explanation: ‘Encapsulation’ acts as protective wrapper that prevents code and data from being accessed by other code defined outside the wrapper. … Explanation: Each method or variable in a class may be marked ‘public’ or ‘private’. They are called Access Specifiers.

Which three are valid declarations of a float?

Explanation: (1) and (3) are integer literals (32 bits), and integers can be legally assigned to floats (also 32 bits). (6) is correct because (F) is appended to the literal, declaring it as a float rather than a double (the default for floating point literals).

What is it called if an object has its own lifecycle and there is no owner?

Explanation: Encapsulation is implemented by combining methods and attribute into a class. … Explanation: It is a relationship where all objects have their own lifecycle and there is no owner. This occurs where many to many relationships are available, instead of one to one or one to many.

What is true constructor?

What is true about constructor? Explanation: Constructor returns a new object with variables defined as in the class. Instance variables are newly created and only one copy of static variables are created. … Explanation: No instance can be created of abstract class.

What kind of statement is if statement?

An if statement is a programming conditional statement that, if proved true, performs a function or displays information. Below is a general example of an if statement, not specific to any particular programming language.

Which are selection statements in Java?

Java has three types of selection statements. The if statement either performs (selects) an action, if a condition is true, or skips it, if the condition is false. The if … else statement performs an action if a condition is true and performs a different action if the condition is false.

What is true about DO statement?

What is true about do statement? Explanation: Do statement checks the condition at the end of the loop. Hence, code gets executed at least once. … Explanation: Break is used with a switch statement to shift control out of switch.

What Cannot be declared static?

Which of these cannot be declared static? … Explanation: All objects of class share same static variable, when object of a class are declared, all the objects share same copy of static members, no copy of static variables are made.

Which of the following is correct with respect to jump statement in C?

Explanation: As per C standard, “A jump statement causes an unconditional jump to another place”. So if we see carefully, all “goto”, “continue”, “break” and “return” makes the program control jump unconditionally from one place to another. That’s why correct answer is E.

Do statements in C?

Syntax. iteration-statement: do statement while ( expression ) ; The expression in a do-while statement is evaluated after the body of the loop is executed. Therefore, the body of the loop is always executed at least once.

Which three are valid declarations of a char?

Which three are valid declarations of a char? char c1 = 064770; char c2 = ‘face’;

Which statement can be used to test equality alone?

switch statement can only test for equality, whereas if statement can evaluate any type of boolean expression. it is possible to create a nested switch statements. Answer: two case constants in the same switch can have identical values.

Which of these selection statements test only for equality in Java?

Which of these selection statements test only for equality? Explanation: Switch statements checks for equality between the controlling variable and its constant cases.

Which loop is guaranteed to execute at least one time?

do-while loopThe do-while loop is similar to the while loop, except that the test condition occurs at the end of the loop. Having the test condition at the end, guarantees that the body of the loop always executes at least one time.

Which is a valid declarations of a string *?

Answer: A. Option A sets the String reference to null.

Which one is a valid declaration of Boolean?

The correct valid declaration is boolean b1 = false.

Which is not oops concept in Java?

Inheritance, Encapsulation, Polymorphism and Abstraction.