- What's relationship between JavaScript and ECMAScript? - ECMAScript is yet another name for JavaScript (other names include LiveScript). The current JavaScript that you see supported in browsers is ECMAScript revision 3.
- What are JavaScript types? - Number, String, Boolean, Function, Object, Null, Undefined.
- How do you convert numbers between different bases in JavaScript? - Use the parseInt() function, that takes a string as the first parameter, and the base as a second parameter. So to convert hexadecimal 3F to decimal, use parseInt ("3F", 16);
- What does isNaN function do? - Return true if the argument is not a number.
- What is negative infinity? - It's a number in JavaScript, derived by dividing negative number by zero.
- What boolean operators does JavaScript support? - &&, and !
- What does "1"+2+4 evaluate to? - Since 1 is a string, everything is a string, so the result is 124.
- How about 2+5+"8"? - Since 2 and 5 are integers, this is number arithmetic, since 8 is a string, it's concatenation, so 78 is the result.
- What looping structures are there in JavaScript? - for, while, do-while loops, but no foreach.
- How do you create a new object in JavaScript? - var obj = new Object(); or var obj = {};
- How do you assign object properties? - obj["age"] = 17 or obj.age = 17.
- What's a way to append a value to an array? - arr[arr.length] = value;
- What is this keyword? - It refers to the current object.
What is MQ and what does it do? Ans. MQ stands for MESSAGE QUEUEING. WebSphere MQ allows application programs to use message queuing to participate in message-driven processing. Application programs can communicate across different platforms by using the appropriate message queuing software products. What is Message driven process? Ans . When messages arrive on a queue, they can automatically start an application using triggering. If necessary, the applications can be stopped when the message (or messages) have been processed. What are advantages of the MQ? Ans. 1. Integration. 2. Asynchrony 3. Assured Delivery 4. Scalability. How does it support the Integration? Ans. Because the MQ is independent of the Operating System you use i.e. it may be Windows, Solaris,AIX.It is independent of the protocol (i.e. TCP/IP, LU6.2, SNA, NetBIOS, UDP).It is not required that both the sender and receiver should be running on the same platform What is Asynchrony? Ans. With messag...
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