Qualcomm is a choice of many looking for a good job and if you are one of them then this article is very important for you. As we have given some very important interview questions in this article which will be helpful for you in your qualcomm interview.
Most Important Interview Questions for Qualcomm
Go through all the below written questions to get a clear understanding about interview level of qualcomm.
Question 1. What is SATA?
Answer. SATA stands for Serial Advanced Technology Attachment. It is high speed computer bus interface designed to connect the host bus adapters to mass storage devices, such as hard disk drives and optical drives.
Question 2. What’s the Difference Between Stack and Queue?
Answer. The difference between a stack and a queue is that the stack is based on the Last in First out (LIFO) principle, and a queue is based on FIFO (First In, First Out) principle.
Question 3. What is Polymorphism?
Answer. Polymorphism is briefly described as “one interface, many implementations”. Polymorphism is a characteristic of being able to assign a different meaning or usage to something in different contexts – specifically, to allow an entity such as a variable, a function, or an object to have more than one form. There are two types of polymorphism:
Compile time polymorphism
Run time polymorphism
Compile time polymorphism is method overloading whereas Runtime time polymorphism is done using inheritance and interface.
Question 5. Why is Char array preferred over String to store a password?
Answer. String is immutable in Java and stored in the String pool. Once it is created it stays in the pool until the garbage is created making the password available in the memory. It is a security risk because anyone who has access to the memory dump can find the password as clear text.
Question 6. Assume that you have 1000 input features and 1 target feature. You have to filter out 100 most significant features that justify the relationship between input features and the target output. What will you use?
Answer. For solving this problem, we will use Principle Discriminant Analysis as the number of features are much larger than the significant ones.
Question 7. What Are Constructors in Java?
Answer. In Java, the constructor is a block of code used to initialize an object.
Question 8. What is abstraction in Java?
Answer. Abstraction refers to the quality of dealing with ideas rather than events. It basically deals with hiding the details and showing the essential things to the user. Thus you can say that abstraction in Java is the process of hiding the implementation details from the user and revealing only the functionality to them. Abstraction can be achieved in two ways:
Abstract Classes (0-100% of abstraction can be achieved)
Interfaces (100% of abstraction can be achieved)
Question 9. What is Nashorn in Java 8?
Question 10. What are the different types of DRAM?
Answer. The different types of DRAM are SRAM, VRAM, SGRAM, DDR-SDRAM
Question 11. What is the difference between System.out, System.err, and System.in?
Answer. System.out and System.err represent the monitor by default and thus can be used to send data or results to the monitor. System.out is used to display normal messages and results. System.eerr is used to display error messages. System.in represents InputStream object which by default represents standard input device, i.e., keyboard.
Question 12. Suppose that you are training your machine learning model on the text data. The document matrix that is created consists of more than 200K documents. What techniques can you use to reduce the dimensions of the data?
Answer. In order to reduce the dimensions of our data, we can use any one of the following three techniques:
Latent Semantic Indexing
Latent Dirichlet Allocation
Question 13. Can a Dead Thread Be Started Again?
Answer. No, a thread that is in the dead state can’t be started again.
Question 14. What Is an Anonymous Class?
Answer. The class defined without a name in a single line of code using new keyword is known as an anonymous class.
Question 15. What is heat sink and what is the use in the system?
Answer. To lower the temperature of a device, a heat sink component is used. It is there on the microprocessor and if it is not functioning well then the computer will shut down automatically.
Question 16. What are RJ45 and RJ11 connectors?
Answer. RJ45 connectors are used for LAN/internet connections while RJ11 connectors are used for Table cable connectors.
Question 17. What is inheritance in Java?
Answer. Inheritance in Java is the concept where the properties of one class can be inherited by the other. It helps to reuse the code and establish a relationship between different classes. Inheritance is performed between two types of classes:
Parent class (Super or Base class)
Child class (Subclass or Derived class)
A class which inherits the properties is known as Child Class whereas a class whose properties are inherited is known as Parent class.
Question 18. Distinguish between a predicate and a function.
Answer. A predicate takes one argument and returns a Boolean value.
A function takes one argument and returns an object. Both are useful for evaluating lambda expressions.
Question 19. Is it possible to import the same package or class twice? Will the JVM load the package twice at runtime?
Answer. It is possible to import the same package or class more than once. It will not have any effect on the compiler or JVM. The JVM will load the class more than once, irrespective of the number of times you import the same class.
Question 20. Explain TF/IDF Vectorization
Answer. TF/IDF stands for Term Frequency/Inverse Document Frequency. It is used for information retrieval and mining. It is used as a weighing factor to find the importance of word to a document. This importance is proportional to, and increases with the number of times a word occurs in the document but is offset by the frequency of the word in a corpus.
We have given some very important questions of the Technical and HR interview above. If you have still any queries then you can comment below or you can contact us. We here at Alpingi are always happy to help you.
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