Quiz will ask 20 randomly selected questions with allotted time of . You can take the quiz more than once. Once you submit the quiz, you can review how you have done, the correct the answers for each questions and the explanation for the correct the answer.
11 Modules
Which of the following statements correctly defines a variable of type 'number' in TypeScript?
let num: number = '5';
let num: number = 5;
let num: number = 5.0;
let num: number = true;
What will be the output of the following code snippet: let a: number = 5; let b: number = 10; console.log(a + b);?
15
510
NaN
undefined
Which of the following is NOT a valid way to declare a number in TypeScript?
let num = 42;
let num: number = 42;
let num: number = '42';
let num: number | null = null;
What will be the result of the following expression in TypeScript: let x: number = 5; let y: number = 2; console.log(x / y);?
2.5
2
NaN
undefined
Which of the following statements about the 'number' type in TypeScript is true?
The 'number' type can represent both integer and floating-point numbers.
The 'number' type can represent only integers.
The 'number' type can represent NaN and Infinity.
The 'number' type cannot represent negative values.
11 Modules