JavaScript Pre Kt Assessment
This quiz will test the very basic JS knowledge. If you have gone through w3 schools website, this should be a very easy quiz. Have fun!
- 1.How do you create a function named coolFunction?
- A.
Function coolfunction () {}
- B.
Function=coolFunction();
- C.
Function:coolFunction(){}
- D.
Function coolFunction () {}
- 2.An alert box is very useful for debugging. To display text ‘’message’ along with the value contained in variable msg, an alert box should be called via:
- A.
Call alert ('message' + msg);
- B.
Alert ('message' + msg);
- C.
AlertBox ('message' + msg);
- D.
All of the above
- 3.In a JS statement, what is the difference between a++ vs ++a where a is a variable:
- A.
A++ increments the value of a by 1, ++a is incorrect
- B.
Both are same and increment the value of a by 1
- C.
Both increments the value of a by 1 but a++ does it after assignment and ++a does it before assignment
- D.
Both are wrong and will cause an error in the code
- 4.- Which of these is not a comparison operator?
- A.
- B.
>
- C.
=
- D.
!=
- 5.Which command skips the rest of a case statement ?
- A.
Return
- B.
Exit
- C.
Continue
- D.
Break
- 6.How can you reference part of a string starting from 4th character and containing a total of 5 characters contained in var str? (e.g. from a string “hello world!”, it should return “lo wo”).
- A.
Str.substr(4,9);
- B.
Str.part(3,5);
- C.
Str.substr(3,5);
- D.
Str.part(4,9);
- 7.Which event do you use to run something after the page has finished loading?
- A.
Onfinished
- B.
Onload
- C.
Onunload
- D.
Oncomplete
- 8.How do you define a "for" loop which starts from 0, goes till 5 and increments by 1 after each iteration?
- A.
For (i
- B.
For i = 0 to 5 {…}
- C.
For (i = 0; i
- D.
For (i = 0; i
- 9.What is the correct way to write a JavaScript array?
- A.
Var txt = new Array ="tim","kim","jim";
- B.
Var txt = new Array("tim","kim","jim");
- C.
Var txt = new Array:1=("tim")2=("kim")3=("jim");
- D.
Var txt = new Array(1:"tim",2:"kim",3:"jim");
- 10.What will the statement mentioned below will do?result = (testCond == 1) ? “pass” : “fail”;
- A.
Will return error as this is not a valid statement in JS.
- B.
If testCond is equal to 1 then result will contain an array with two elements pass and fail.
- C.
If testCond is equal to 1 then result will contain string pass otherwise it will be set to fail.
- D.
Result will contain value of testCond if the testCond is equal to 1
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