Why do we use synchronized ?

865

---

What widgets can not do ?

942

---

What is synchronous vs. Asynchronous in gcd ?

829

---

What is the ? In swift?

916

---

What is @synthesize in objective-c ?

878

---

What’s the difference between an “app id” and a “bundle id” and what is each used for?

951

---

What is a category and when is it used?

961

---

What are “strong” and “weak” references? Why are they important and how can they be used to help control memory management and avoid memory leaks?

819

---

What are the limits of accessibility ?

915

---

Explain the characteristics of ios?

883

---

Explain place holder constraint

842

---

Explain differences between foundation and corefoundation

888

---

What is auto-layout?

957

---

What is the difference between let and var in swift?

965

---

What is the difference between atomic and non-atomic properties? Which is the default for synthesized properties? When would you use one over the other?

818

---